神奈川県の都市近郊におけるセミ類の脱皮殻調査をもとにした種組成および発生消長

抄録

Species composition and seasonal occurrence of six Cicadidae species were studied on campus of Yokohama National University (YNU), Yokohama City (an urban park with evergreen forests), around Tamanawa Ryuhoji Temple (TRT) located in temple forest at Kamakura City (an Satoyama - country side forest), and in Tujidou Kaihin Park (TKP), Fujisawa City, located at the beachfront of Shonan area (conifer and broad-leaved forests), in 2012 to 2013. The study is based on the exuviae of specimens collected every day or every other day at three different environments, an urban park (YNU), a temple forest (TRT), and a forest reserve planted along the coast (TKP). Five species - Graptopsaltria nigrofuscata, Meimuna opalifera, Platypleura kaempferi, Tanna japonensis, and Hyalessa maculaticollis - were found at TRT without apparent dominance by the number of individuals. Two species, G. nigrofuscata and H. maculaticollis, accounted for more than 90% of total number of collected individuals at YNU, with lesser numbers of P. kaempferi and M. opalifera. Cryptotympana facialis occupied three-quarters of the total number of collected individuals at TKP, with lesser numbers of G. nigrofuscata. The six studied species were present between mid-July to early October, with the greatest emergence recorded in August. P. kaempferi appeared first, usually in early July, and its emergence continued for about 40 days. G. nigrofuscata, H. maculaticollis, T. japonensis appeared mid- to late July and their emergences continued for about two months. M. opalifera appeared last and its emergence peak was observed by the end of early October. C. facialis emerged at first in mid-July, and its emergence went on until mid-September.